Tapered wall lamp



FIG. 1 is a front perspective view of a tapered wall lamp showing my new design;

FIG. 2 is a front view thereof; the rear view is not a part of the claimed design;

FIG. 3 is a side view thereof; the opposite side view is a mirror image;

FIG. 4 is a top view thereof; and

FIG. 5 is a bottom view thereof. 

The ornamental design for a tapered wall lamp, as shown and described. 